Peak Energy-Isotropic Energy Relation in the Off-Axis Gamma-Ray Burst Model
Peak Energy-Isotropic Energy Relation in the Off-Axis Gamma-Ray Burst Model
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DOI：
10.1086/421084
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发表时间：
2004-01
期刊：
影响因子：
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通讯作者：
R. Yamazaki;K. Ioka;Takashi Nakamura
中科院分区：
文献类型：
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作者：
R. Yamazaki;K. Ioka;Takashi Nakamura
利用伽玛射线暴（GRBs）瞬发的简单均匀喷射模型，我们再现了观测到的峰值能量-各向同性能量关系。蒙特卡罗模拟表明，低各向同性能量部分主要由离轴方向的事件所控制，离轴事件的数量约为正轴发射的三分之一。我们还计算了伽玛暴、富x射线伽玛暴和高能瞬变探测器2探测到的x射线闪光的观测事件率，发现它们是相似的。
Using a simple uniform jet model of prompt emissions of gamma-ray bursts (GRBs), we reproduce the observed peak energy-isotropic energy relation. A Monte Carlo simulation shows that the low isotropic energy part of the relation is dominated by events viewed from off-axis directions, and the number of the off-axis events is about one-third of the on-axis emissions. We also compute the observed event rates of the GRBs, the X-ray-rich GRBs, and the X-ray flashes detected by High Energy Transient Explorer 2, and we find that they are similar.